@article{MT_1989_14_a7,
     author = {V. G. Maz'ya and S. V. Poborchi},
     title = {Traces of functions in {Sobolev} spaces on a boundary of a domain with a cusp},
     journal = {Matemati\v{c}eskie trudy},
     pages = {182--208},
     publisher = {mathdoc},
     volume = {14},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1989_14_a7/}
}